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Rayan
→ Pay attention
Before contest
Codeforces Round 1006 (Div. 3)
42:04:56
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x11864
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10937
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x559
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x6138
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4257
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6423
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5755
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5847
1118B
Tanya and Candies
implementation
1200
x12446
1118A
Water Buying
math
800
x20400
1117G
Recursive Queries
data structures
2500
x732
1117F
Crisp String
bitmasks
,
dp
2500
x606
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1552
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4471
1117C
Magic Ship
binary search
1900
x7524
1117B
Emotes
greedy
,
math
,
sortings
1000
x14739
1117A
Best Subsegment
implementation
,
math
1100
x11099
1116D6
Hessenberg matrix
*special problem
x79
1116D5
Creeper
*special problem
x149
1116D4
TIE fighter
*special problem
x169
1116D3
X-wing fighter
*special problem
x203
1116D2
Pattern of increasing blocks
*special problem
x233
1116D1
Block diagonal matrix
*special problem
x275
1116C3
``Is the number of ones divisible by 3?'' oracle
*special problem
x184
1116C2
``Is the bit string periodic?'' oracle
*special problem
x186
1116C1
Alternating bits oracle
*special problem
x264
1116B2
Not A, not B or not C?
*special problem
x59
1116B1
Distinguish three-qubit states
*special problem
x133
1116A2
Generate equal superposition of four basis states
*special problem
x180
1116A1
Generate state |00⟩ + |01⟩ + |10⟩
*special problem
x323
1115U3
Block unitary
*special problem
1700
x198
1115U2
Chessboard unitary
*special problem
1600
x236
1115U1
Anti-diagonal unitary
*special problem
1500
x258
1115G3
Palindrome checker oracle
*special problem
1600
x233
1115G2
OR oracle
*special problem
1600
x313
1115G1
AND oracle
*special problem
1100
x393
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x2068
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2932
1114D
Flood Fill
dp
1900
x7009
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7481
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x9061
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x19022
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7839
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17550
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x969
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x988
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6390
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6333
1111A
Superhero Transformation
implementation
,
strings
1000
x17217
1110H
Modest Substrings
dp
,
strings
3500
x307
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x640
1110F
Nearest Leaf
data structures
,
trees
2600
x1809
1110E
Magic Stones
constructive algorithms
,
math
,
sortings
2200
x4269
1110D
Jongmah
dp
2200
x3662
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x9547
1110B
Tape
greedy
,
sortings
1400
x12375
1110A
Parity
math
900
x15260
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x313
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x560
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1372
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x266
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4408
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8609
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x3044
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2258
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4616
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15527
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x12129
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x23735
1108A
Two distinct points
implementation
800
x22196
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1086
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x825
1107E
Vasya and Binary String
dp
2400
x2392
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3758
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x10084
1107B
Digital root
math
,
number theory
1000
x16366
1107A
Digits Sequence Dividing
greedy
,
strings
900
x12160
1106F
Lunar New Year and a Recursive Sequence
math
,
matrices
,
number theory
2400
x1006
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2631
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x15516
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14918
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6821
1106A
Lunar New Year and Cross Counting
implementation
800
x12478
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1693
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x4209
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10574
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9980
1105A
Salem and Sticks
brute force
,
implementation
1100
x11094
1104B
Game with string
data structures
,
implementation
,
math
1200
x15412
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15541
1103E
Radix sum
fft
,
math
,
number theory
3400
x242
1103D
Professional layer
bitmasks
,
dp
3100
x428
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x883
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3307
1103A
Grid game
constructive algorithms
,
implementation
1400
x9972
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x2070
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x6193
1102D
Balanced Ternary String
greedy
,
strings
1500
x8160
1102C
Doors Breaking and Repairing
games
1200
x13324
1102B
Array K-Coloring
greedy
,
sortings
1400
x10581
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